Hinds L A, Tyndale-Biscoe C H
J Endocrinol. 1982 Apr;93(1):99-107. doi: 10.1677/joe.0.0930099.
The plasma progesterone concentrations were measured in one group of tammars undergoing non-delayed oestrous cycles and pregnancy, and in another group undergoing pregnant and non-pregnant cycles which had been inhibited by lactation and initiated by removal of the pouch young. The basal concentrations of progesterone during lactation and for the first 5 days of the cycle were less than 200 pg/ml. In all animals there was a consistent peak of about 450 pg/ml lasting 1-2 days, on days 5-8 and this was followed by a return to the basal concentrations. From day 10 the concentration rose and remained at 500 pg/ml until the day of parturition and/or oestrus when it again returned to the basal concentration. There was no difference in pattern of the early peak associated with pregnancy but the peak concentration in the delayed pregnant cycles was just significantly higher than in the non-pregnant cycles of the same animals. These data do not support the hypothesis for the maternal recognition of early pregnancy in the tammar.
对一组经历非延迟发情周期和怀孕的帚尾袋貂，以及另一组经历受泌乳抑制且通过移除育儿袋幼崽启动的怀孕和非怀孕周期的帚尾袋貂，测量了血浆孕酮浓度。泌乳期间以及周期的前5天，孕酮的基础浓度低于200皮克/毫升。在所有动物中，在第5 - 8天有一个持续1 - 2天、约450皮克/毫升的一致峰值，随后又回到基础浓度。从第10天起，浓度上升并维持在500皮克/毫升，直到分娩和/或发情日，此时它再次回到基础浓度。与怀孕相关的早期峰值模式没有差异，但延迟怀孕周期中的峰值浓度仅显著高于同一动物的非怀孕周期。这些数据不支持帚尾袋貂母体识别早期怀孕的假说。
